Mastering Spring 5.0

Spring Boot application class

The following code block shows the generated SpringBootApplication class, FirstWebServiceWithKotlinApplication. We made the class open to enable Spring Boot to override it:

    @SpringBootApplication    open class FirstWebServiceWithKotlinApplication    fun main(args: Array<String>) {      SpringApplication      .run(         FirstWebServiceWithKotlinApplication::class.java,         *args)    }

The following are a few important things to note:

• Package, import, and annotations are the same as that of a Java class.
• The declaration of the main function in Java was public static void main(String[] args). In the preceding example, we are using the Kotlin function syntax. Kotlin does not have static methods. Any function declared outside of a class can ...